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    Augmented reality precision tracking and display
    2.
    发明授权
    Augmented reality precision tracking and display 有权

    公开(公告)号：US12072406B2

    公开(公告)日：2024-08-27

    申请号：US18138581

    申请日：2023-04-24

    申请人： Snap Inc.

    发明人： Ted Brown

    IPC分类号： G01S1/04 ,  G06F3/01 ,  G06T7/20 ,  G06T17/10 ,  G06T19/00 ,  H04B1/7163

    CPC分类号： G01S1/0423 ,  G01S1/0428 ,  G06F3/012 ,  G06T7/20 ,  G06T17/10 ,  G06T19/006 ,  H04B1/71635

    摘要： Example systems, devices, media, and methods for tracking movable objects and presenting virtual elements on a display in proximity to the movable objects. Ultra-wideband (UWB) transmitters are mounted to each movable object in an environment including at least two synchronized UWB receivers. The receivers calculate current locations of movable objects. Portable electronic devices, including eyewear devices, are paired with the receivers in a network. A localization application determines a current location of each eyewear device. A rendering application presents virtual elements on a display as an overlay relative to the current movable object location and in relative proximity to the current eyewear location. The physical environment is represented by a static mesh. A time synchronized tracking application identifies moving items that are not coupled to a UWB transmitter. The rendering application presents the virtual elements on the display in accordance with the static mesh and the moving items.

    VEHICLE AND DEPLOYABLE LOCATION MARKING SYSTEM
    4.
    发明公开
    VEHICLE AND DEPLOYABLE LOCATION MARKING SYSTEM 审中-公开

    公开(公告)号：US20240201304A1

    公开(公告)日：2024-06-20

    申请号：US18084678

    申请日：2022-12-20

    申请人： Ramon Ledgister, II

    发明人： Ramon Ledgister, II

    IPC分类号： G01S1/04 ,  B60L1/00 ,  B60Q7/00

    CPC分类号： G01S1/0423 ,  B60L1/00 ,  B60Q7/00

    摘要： A vehicle and deployable location marking system for deploying from a vehicle includes a vehicle including an exterior frame and an undercarriage. A power source is mounted on the vehicle and an electromagnet is coupled to the undercarriage of the vehicle and is electrically coupled to the power source. A switch is electrically coupled to the electromagnet and is mounted on the steering wheel, wherein the switch turns on or off a magnetized condition the electromagnet. A beacon for marking a location is releasably coupled to the electromagnet and releases from the electromagnet when actuated by the switch to a demagnetized condition.

    System and method for ultra-high-resolution ranging using RFID
    7.
    发明授权
    System and method for ultra-high-resolution ranging using RFID 有权

    公开(公告)号：US11914018B2

    公开(公告)日：2024-02-27

    申请号：US17900480

    申请日：2022-08-31

    申请人： Cornell University

    发明人： Xiaonan Hui ,  Edwin C. Kan

    IPC分类号： G01S1/30 ,  G01S1/04 ,  G01S1/02 ,  G01S13/84 ,  G01S13/75

    CPC分类号： G01S1/306 ,  G01S1/022 ,  G01S1/0428 ,  G01S13/84 ,  G01S13/751

    摘要： A radio-frequency method for range finding includes modulating a reference signal having an intermediate frequency to a downlink signal having a carrier frequency using a clock signal. The downlink signal is transmitted to a tag using a transceiver. An uplink signal backscattered front the tag is received and demodulated using the clock signal. The uplink signal has a frequency that is a harmonic of the carrier frequency. A distance between the tag and the transceiver is calculated based on a phase of the demodulated uplink signal. A system for range finding includes a transceiver and a processor. The transceiver modulates a reference signal to downlink signal and transmits the downlink signal. The transceiver receives and demodulates an uplink signal. The processor is configured to receive the demodulated uplink signal and calculate a distance between the tag and the transceiver using a phase of the demodulated uplink signal.

    Face-to-face state determination system
    9.
    发明授权
    Face-to-face state determination system 有权

    公开(公告)号：US11852710B2

    公开(公告)日：2023-12-26

    申请号：US17271650

    申请日：2019-08-29

    申请人： Where, Inc. ,  Exeo Group, Inc.

    发明人： Hajime Maruta ,  Nobuyuki Akazawa

    IPC分类号： G01S1/04 ,  G01S5/02 ,  H04W4/02 ,  H04W4/029

    CPC分类号： G01S1/045 ,  G01S5/0252 ,  G01S5/0294 ,  H04W4/029

    摘要： Provided is a face-to-face situation determination system in which a first beacon, which is a beacon carried by a first user, transmits a first signal including information identifying the first beacon. A second beacon, which is a beacon carried by a second user, upon receiving the first signal from the first beacon, transmits, toward a control device, a second signal including information identifying the first beacon, a first signal reception intensity, and information identifying the second beacon. The control device receives the second signal and, on the basis of the first signal reception strength included in the second signal, determines that the first user and the second user are facing each other if the first signal reception strength is greater than or equal to a first threshold value for a predetermined period or longer, and determines that the first user and the second user are facing one direction.

    Method and system to synchronize radio devices in a wireless network
    10.
    发明授权
    Method and system to synchronize radio devices in a wireless network 有权

    公开(公告)号：US11849370B2

    公开(公告)日：2023-12-19

    申请号：US17181286

    申请日：2021-02-22

    申请人： Red Point Positioning Corporation

    发明人： Georgiy Pekhteryev ,  Oleg Mitin ,  ZhenZhen Ye ,  Chunjie Duan ,  Volodymyr Piasetskyi ,  Serhii Rybalko

    IPC分类号： H04W4/029 ,  G01S1/04 ,  H04W56/00

    CPC分类号： H04W4/029 ,  G01S1/042 ,  H04W56/001

    摘要： Aspects of the subject disclosure may include, for example, a method of determining, by a processing system, complete neighbor information for a plurality of radio devices in a wireless network, wherein the complete neighbor information denotes neighboring radio devices; establishing, by the processing system, a backbone list including radio devices that provide beacons, wherein the backbone list includes a first radio device of the plurality of radio devices; determining, by the processing system, a set of radio devices in the plurality of radio devices that are not neighboring radio devices of every radio device in the backbone list; adding, by the processing system, an additional radio device from the plurality of radio devices to the backbone list responsive to an existence of at least one radio device in the set, wherein the additional radio device has at least one neighboring radio device in the backbone list and has at least one neighboring radio device in the set; and repeating, by the processing system, the determining the set step and the adding step until the set is empty. Other embodiments are disclosed.